192 clutches and power-stop control – Clutches – Automatic
Patent
1996-09-18
1998-04-14
Pitts, Andrea L.
192 clutches and power-stop control
Clutches
Automatic
81 5739, 81 63, 81 632, 74577M, B25B 1346
Patent
active
057381925
ABSTRACT:
A power tool is provided with a yoke having first and second chambers each of which open into said bore; an annular toothed gear is rotatably disposed in said bore, each gear tooth being rounded at its outer extremity and each gap between adjacent teeth being rounded in such manner that the outwardly presented angle of each gap is greater than the inwardly presented angle of each tooth; one pawl comprising a cylindrical element and a wing is pivotally disposed in each chamber, each wing having a first pawl tooth sized for snug fitting disposition between adjacent gear teeth and a second pawl tooth which is sized and shaped for using an adjacent gear tooth to urge the first pawl tooth snugly into a gap on the gear as the first pawl is pivoted toward the gear; a biasing member in each chamber which urges the wing towards the gear, and a direction control which selectively allows only one of the two pawls to engage the gear as the yoke is moved with respect to the gear.
REFERENCES:
patent: 581427 (1897-04-01), Olson
patent: 2020883 (1935-11-01), Gagne
patent: 2107568 (1938-02-01), Haist
patent: 2143121 (1939-01-01), Cox
patent: 2407558 (1946-09-01), Kress
patent: 2744432 (1956-05-01), Rueb
patent: 2773574 (1956-12-01), Able
patent: 4520697 (1985-06-01), Moetteli
patent: 4722253 (1988-02-01), Chow
patent: 4977795 (1990-12-01), McVey
patent: 5000066 (1991-03-01), Gentiluomo
patent: 5058463 (1991-10-01), Waunop
patent: 5174176 (1992-12-01), Krivec
patent: 5269195 (1993-12-01), Kitagawara
patent: 5328241 (1994-07-01), Haider
patent: 5392672 (1995-02-01), Larson et al.
patent: 5450773 (1995-09-01), Darrah et al.
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